| 大口径望远镜水平轴系的模态分析 |
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| 引用本文： | 张林波,任戈,陈洪斌. 大口径望远镜水平轴系的模态分析[J]. 光电工程, 2003, 30(2): 8-10 |
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| 作者姓名： | 张林波 任戈 陈洪斌 |
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| 作者单位： | 中国科学院光电技术研究所,四川,成都,610209 |
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| 基金项目： | 国家863高技术项目资助。 |
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| 摘 要： | 根据某大口径望远镜水平轴系的结构设计方案，利用结构分析软件I—DEAS，建立了结构分析模型。求得了水平轴系前几阶固有频率和振型图。分析结果显示出了水平轴各部分结构振动的强弱分布，为结构的动力学优化设计提供了可靠的依据。提出了次镜支撑的偏置十字型中心结构，该结构具有较高的谐振频率，因此可以用于大口径望远镜中。
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| 关 键 词： | 水平轴系 大口径望远镜 有限元分析 固有频率 |
| 文章编号： | 1003-501X(2003)02-0008-03 |
| 收稿时间： | 2002-12-06 |
Modal analysis for horizontal shafting of a large-aperture telescope |
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| ZHANG Lin-bo,REN Ge,CHEN Hong-bin. Modal analysis for horizontal shafting of a large-aperture telescope[J]. Opto-Electronic Engineering, 2003, 30(2): 8-10 |
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| Authors: | ZHANG Lin-bo REN Ge CHEN Hong-bin |
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| Abstract: | According to the structural design scheme for horizontal shafting of a large-aperture telescope, the structural analysis model is established by means of the structural analysis software I-DEAS. The natural frequency and the first ten vibration models of the horizontal shafting are obtained. The analysis results show the large-small distributions of the vibration at various parts of the horizontal shaft and reliable foundations are provided for the dynamic optimal design of the structure. An offset cross structure for supporting secondary mirror is proposed. The structure has a higher resonance frequency so it can be applied to large-aperture telescope. |
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| Keywords: | Altitude axis Large-aperture telescope Finite element analysis Natural frequency |
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